If I were an engineer I would build a car with at least 400hp, 8 cylinders, large oil capacity with bypass filtration. The rod and main bearings would be oversized. Everything else over designed to about 200% expected worse use. Low rpm high torque design. Designed for the back yard mechanic to fix when it broke down.

Create a body that had replacable pieces, so you would only buy one and just update with easy replace parts. No more polluting the enviornment producing upmteen gillion new cars a year.

At least 15 inch rotors at each wheel for stopping, suspension capable of .9g side loads in real world, not steady state skid pad.

In other words, a car that would be fun to drive, be efficient, and be able to own it 20 years minimum.

John Lacey